Hi Alan, Thanks for the information. Besides my below queries, could you please also let me know from where I should begin with ?
Like first I was thinking of understanding at least the initialization routine from the starting point of raspberry pi. Starting with the stack/vector initialization and ending up to driver and filesystem(in brief)... Would be good if there any documentation which I can directly refer to apart from code. On Wed, Aug 20, 2014 at 7:07 PM, Alan Cudmore <alan.cudm...@gmail.com> wrote: > Hi Ritesh, > For the Raspberry Pi, Andre Marques added GPIO, SPI, and I2C support for > his Google Summer of Code project. When this code is merged, it will allow > many other devices to work on the Pi. There is still > Ok, I will try to go through this once. > plenty of other work to do on the Raspberry Pi BSP including: > - JTAG debugging - I have not had the time to continue my work with the > MiniMod/OpenOCD JTAG debugger. It currently does not work reliably for me. > Another user is using a second Raspberry Pi as a JTAG interface. > Any link to that information of using other pi board as JTAG interface ? > - SD card driver - Some work has been done by Andre towards this. > Ok, will try to find out about this more from RTEMS mailing list. Would be good if direct link to github patches or blog. > - USB/Network - The ethernet device goes through the USB interface, which > means that a USB stack has to be in place to access the ethernet chip. > any starting point for this ? > - Console & Framebuffer graphics > - Sound? > > As you can see, there is plenty to work on with the Raspberry Pi BSP. > There are also plenty of other boards/BSPs to work on, but I am biased. > There are over 2.5 million Pi's out there, and I believe that having first > class RTEMS support will help to expand the RTEMS user base. > I agree with the viewpoint. > > Links to Andre's GSOC work: > http://www.rtems.org/wiki/index.php/Raspberry_Pi_BSP_Peripherals > > and the blog > http://asuolgsoc2014.wordpress.com/2014/08/18/testing-the-project/ > Thanks for the link. > > > Alan > > > On Wed, Aug 20, 2014 at 5:40 AM, Hesham Moustafa <heshamelmat...@gmail.com > > wrote: > >> Hi Ritesh, >> >> On Wed, Aug 20, 2014 at 11:28 AM, Ritesh Harjani >> <ritesh.harj...@gmail.com> wrote: >> > Hi All, >> > >> > I have been following RTEMS from quite some time rather I would say my >> > questions have been on & off from this community (although I haven't >> > contributed anything yet). So, this mail is mainly regarding some help >> from >> > the community members so that I can pitch in to contribute something to >> this >> > community. >> > >> > Based on my knowledge I would like to start from ARM bsps/raspberry pi >> as I >> > am seeing quite lot of development activity going on in these areas. >> > >> > If someone can guide me with the following activities it would be great: >> > >> > 1. I need to just start something, may be with a small patch (which >> should >> > be related to the above mentioned area): >> > Earlier I thought of starting with some driver development but without >> > having basic knowledge of RTEMS file structure/other areas, I wasn't >> able to >> > complete it. >> > >> > 2. Need to understand the boot flow and the code initialization routine >> > which can give me an idea as to where all and what all drivers are >> present >> > etc etc.. >> > >> > >> > Later may be I can think of porting/developing some driver for any ARM >> bsp. >> > >> > >> > Background activity done till now: >> > >> > 1. Followed all the steps in Alan's Blog >> > ( >> http://alanstechnotes.blogspot.in/2013/03/running-your-first-rtems-program-on.html >> ): >> > I was able to run ticker.exe sample test on Raspberry pi. Although >> there are >> > some doubts which I have asked below. >> > >> > 2. Ordered OpenOCD based JTAG board. Once this comes I will make this >> JTAG >> > board start working. >> > >> > >> > Queries: >> > 1. Is by default raspberry pi MMU enabled and all the page table are >> setup >> > ?(from HEAD of git://git.rtems.org/rtems.git) >> > >> > 2. I cannot see any libmmu tests which I think Hesham developed during >> GSOC >> > 2013 ? >> > Do we keep this into different git ? >> > >> Some of my project code has been merged (mainly low-level parts of >> libmm implemented for Raspberry Pi). The other code is held in my old >> github repo here https://github.com/heshamelmatary/rtems-gsoc2013 >> > 3. With OpenOCD and gdb is it possible to see all the CP15 coprocessor >> > registers on ARM ? >> > >> > 4. How was Hesham able to debug and see the MMU register settings(like >> > SCTLR.MMU) during his work on GSoc 2013 libmmu development for >> raspberry pi >> > ? Was it QEMU ? >> > >> I was using QEMU for debugging Xilinx Zynq BSP, as well as Realview. >> For Raspberry Pi (worked on the HW board, no simulators), I just used >> printf to print out the values of registers which I need to peek into. >> > >> > >> > Please feel free to guide me through the work plan if anyone have in >> his/her >> > mind for ARM bsps. >> > >> > >> > >> > Thanks >> > Ritesh Harjani >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> _______________________________________________ >> devel mailing list >> devel@rtems.org >> http://lists.rtems.org/mailman/listinfo/devel >> > >
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